[Contextual Edu] Update data on education triggered

When education is triggered, reset signal count and the usage session time, increase edu count by 1.
Check if the usage session expires when new signal count is received, restart a new session if expired.

Test: KeyboardTouchpadEduInteractorTest
Test: ContextualEducationRepositoryTest
Bug: 354884305
Flag: com.android.systemui.keyboard_touchpad_contextual_education
Change-Id: I2fa4b5c71134fb210377fc13a32f8864891111ca